<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">
	
function a(){
	this.f = 10;
	//this.l();
	alert(this.lll);
}
a.prototype.l = function(){
	alert(this.f);
}
a.prototype.lll = ['1','2','3']

new a();

</script>
</body>
</html>